Type-writing machine.



F. L. MORGAN.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE4. I9I5.

Patented Oct. 1, 1918.

2 SHEETSSHEET I.

INVENTOH:

; BY- WWW Ann n; Y.

F. L. MORGAN.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE 4. I915.

Patented Oct; 1, 1918. 2 SHEETS-SHEET 2 INVENTORJ ATTO FY WITNESSES:

. ens rnrrr can.

FRANK L. MOBGAN OF WOODMONT, GONNECTIGUT, ASSIGNOR T0 UNDERWOOD TYPE-WRITER QQMPANY 0F NEWYOBK, N. Y., A CORPORATION OF DEL.&WAHBE.

TYPE-VVRITING- MAG 2:1.

specification of Letters Patent. P ibv mm mm, 1, 119m,

' Application ar a rune a, me. Serial no. aaoea.

machines which are especially constructed to facilitatethe writingof'bills, and simultaneously recording them, in a manner commonly lmownas condensed chargin a mechnism' of this general nature eing illustratedin the patent to W. H. Woodford, No. 923,749, granted June 1, 1909.

In the operation performed by the mechanism of the aforementionedpatent, after the writing of a bill is completed, the platen is turnedbackward a considerable distance,

the written bill withdrawn, another bill head inserted, and the platenthen rotated forward to bring the proper part of the inserted bill headto the printing point. During these operations, the record sheet remainsin the machine; and on the record sheet, the first line of writing onthe new bill directly follows the last line of writing on the precedingbill, so that the necessity is avoided of leaving gaps between entrieson the record sheetcorresponding to the depth of heading on the printedbill heads. This special backward and forward rotation of. the platen isusually efi'ected by 'acrank which rotates about the platen axis betweenprovided upon the platen frame.

practice, it has not been found always practlcable to give the platen abackward throw suflicient to. completely disengagethe written bill fromthe platen. Yet, unless this is done, there is liability of disturbingthe record sheet in removing the written bill.

An object of the present invention is taprovide means for expeditiouslyremovin the written bill without regard to the ackward throw of theplaten, and-without possibility of disturbance'ofthe record sheet. Ineffecting this object of theinvention advantage is taken of theadjustability of the paper fingers longitudinally of the platen andrelatively to the pressure rollers; 'fea-" tures which are common tocertain typewrit ing machines, for instance, the Underwood machine. Byhaving the bill heads s11 htly narrower than the record sheet, the atterits nol inactive positioto prevent may be held by the paper fingerswhilethe former are held only by the pressure rollers; so that, after a billis written, if the pressure of the pressure rollers be relieved, thebill 'may be drawn out of the front of the machine without disturbingthe record sheet which continues to be held by the paper fingers.

F or simplification of the operation of ex- I changing t e written billfor a new bill head, and for the purpose of efiecting the exchange withrapidity and at the*cost of as little labor as possible, the platen,'inthe present invention, is given. its backward drive by a motor, insteadof by hand, as heretofore. It is an object of the invention trolledbyakey which is employed to re lieve the pressure of the pressurerollers on the written bill; so that depression of this before-theplaten is thrown back, and sub- {to have this motor-drive of the platenconsequent release of the key will cause the mo- Y tor to act to throwthe platen to position for the insertion of the new bill head.

'Inthe particular embodiment of the invention hereinafter described indetail, this key-controlled mechanism. cornprises an escapement, which,upon depression of the key, acts to release the motor fi'om a stop whichnormally stays the action thereof and causes the motor to be temporarilystayed by another stop; and, upon release of thevkey, releases the motorfromthe temporary stop,

.to cause it, firstto lock itself to theplaten,

and then to drive the platen. It is an object to have this key actuatethe pressure rollers through the ordinary operating mechanism of thelatter, bntwithout ositive connectionto the latter, both in or er toavoidduplication 'of parts, and in order that the pressure rollers mayhave their usual action at times wh'en'the motor is not involved.

A. feature of the invention is the connection of the motor to a cranksuch as found in the machine of the patent aboverefe to, so that theplaten may be manrec the motor. Another'fa ofthe inven tion is anautomatic he I. disthe wiring of the in N I to - releasing the drum; thedetent being shownof a bill. It is a feature of the invention that,owing to theconnection of the crank to the inotor, the motor stop mayserve as the lock for the crank.

Other features and advantages will hereinafter appear.

in the accompanying drawings,

' Figure 1 is a fragmentary view in perspective, looking from the frontright-hand corner of the machine, and showing the platen and attachedmechanism in normal, or writing, position.

Fig. 2 is a view in end elevation, of the parts shown in Fig. 1, certainof the operative positions of the parts being shown in dotted lines.

Fig. 3 is a .view similar to Fig. 2, except that the operating crank hasbeen thrown ,from normal position to position for the introduction of anew bill head.

Fig. dis a detail view in end elevation showing the relative positionsof the crank, pressure rollers and platen, at the time the written billis being withdrawn.

Fig. 5 is an enlarged detail view 3 in end elevation of certain of theparts shown'in Fig. 1, normal. position being indicated in full lines,and the bill-removing position being indicatedin dotted lines.

Fig. 6 is a 'view similar to Fig. 5, except 'that the positionsindicated are those successivel'y assumed by the parts in returning to,and just before reaching, normal position.

Fig; 7 shows in perspective the several details of the mechanism,unassembled and spaced apart for clearness.

Fig.8 is a fragmentary detail view in perspective'showing the springdrum with its stop, and the detent for holding and in its two positions.

The platen 1 of an Underwood typewriting machine is rotatably mounted bymeans of an axle ,2 in the ends of the platen frame 3. The platen isprovided with the usual finger wheels and 'lineace wheel '(not shown),for feeding it. ounted upon spin dlesd and 5 are pressure rollers 6 and6 for holding the paper to the platen. These.

rollers maybe mounted in the usual way on bell cranks 7 and 8, adaptedtorock on a shaft 9. Between the opposing arms 10 and 10 of "the two bellcranks is another rock shaft 11 having a flattened cut-away 1 portion12, against which the bell cranks are held by the leaf springs 12whichhold the rollers to the platen. Fixed to the shaft 11 is an-arrn 13connected to one end of a to one arm of a lever 15, pivoted at 16 to lthe frame, and carrying on its other arm a finger piece 17. Depressionof finger piece 17 causes theflattened portion 12 0f shaft 11 to beturned seas to spread the opposing v 1 rea ers "ill Fig. 4C position),to release the paper. The

usual finger rolls 18 hold the record sheet to the platen at the top ofthe latter. in the operation of the present invention, the paper fingers19 are adjusted longitudinally of the supporting rail 19 to positions 1nwhich they catch the record sheet near the edge thereof, without,however, catching the bill heads; the latter being of less Width, andbeing held to the platen solely by the pressure rollers-6 and 6*.

Upon one end of the platen axle 2 isfixed a hub 20 of a-wheel 21 havingteeth 22 corresponding in number to the teeth of the line-space wheel.The wheel is rotated by means of a pawl or dog 23, pivoted at 24 upon acrank 25, having a' finger piece 26. The tooth 27 of the pawl isnormally. disengaged from the wheel 21,as shown in Fig. 5, to permitindependent rotation of the wheel and platen. A pin '28 projecting fromthe pawl 23 normally lies within a segmental recess 29 in an annularflange 30 I of a disk 31, which latter is connected by a screw 32 to atie-rod 32, fixed to the platen frame 3. The pin 28' normally overlies atrip or latch 33'formed uponthe side of a small disk 34, having a pivotor stem 35 by means of which it is seated in a circular recess 36 in thefixed disk'31. The trip disk 34 has a pin 39 to engage a slot 40 in thefixed disk 31, to limit the throw of the former, and hence of the latchor trip thereon. A spring 41 is coiled about the stem 35 and engages thepin 39 and the disk 31 to return the trip disk to normal position. Thestem 35 is threaded to'receive a nut -12 in the form of a"- cap'toinclose the pin 39 and spring 41, and to hold the latch or tripmechanism in place. I

When the crank 25 is swung forward, the pin- 28 rides down the forwardinclined edge 43 of the recess 29, and presses down upon the trip 33,causing the trip disk 3 1 to rock from full to dotted line (Fig. 5)position; and the tooth 27 of the pawl 23 to engage a tooth 22 of thewheel 21. 'The pawl is thereafter held to the wheel 21 by engagement ofthe pin 28 with the under side of thugs 30 of the disk 31', and ridesalong this flange as the crank 25 continues its for- Ward movement. Assoon as the pin 28 leaves the recess 29, the trip is returned to normalposition by the spring 41. Con: tinned forward movement of the crank 25causes the wheel 21, and with it the platen, to be rotated until thecrank is arrested by an adjustable stop 44.

a The stop 44, (see' Fig. 7) is tubular, and is'carriedby an annularplate 45 loosely mounted on the platen shaft between i toothed wheel 21and the fixed disk 31; In

rea ers the the form of a plunger within the tubular stop, and adaptedto be projected beyond the plate 45, is .a pin 46 for setting the stop.A coil spring 47 within the tube holds the pin 46 normally projected,and when free to act, projects the in. A button 48 serves as a means forwit drawing the pin into the tube when the stop is to be set, therebypermitting the annular stop-carryin plate to be turned until the pinisbroug t into registration with any selected one of a series of holes'49, at line-space intervals around the flange 30 of the disk 31;whereupon the pin 46- is released to the act10n of its spring 47, andthe stop 44 is set. After the new bill head has been posi- ,tioned, thecrank 25 is thrown rearwardly to bring the bill to printing point.During this rearward movement, the pin 28 returns along the flange .30of the fixed disk,holding the pawl 23 in engagement with the toothedwheel 21, and carrying with it the platen. At this time, however, thetrip 33 is again in full line (Fig. 5) position, and

cannot yield upward because of the position of the stop in 39 thereon atthe-end of its slot 40; so t at the pawl 23, instead of releasing thewheel 21 at the point at which it originally engaged it, passes under,and

isheld by the tr1p 33 in engagement with the wheel 21, until the tri hasbeen passed by the pin 28, and until 3, ug or tooth 50 on the pawl 23strikes a trip formed by a spring 51, secured to the fixed disk 31 whichcauses the pawl to be swung upward around its pivot 24, disengaging thesame from the toothed wheel 21, and causing pin 28 to reenter therecess29 from which it started. A

I stop 52 secured'to the fixed disk 31 finally arrests the crank 25 onits return movement, and determines the normal, or writing, position ofthe parts. It will be noted that the trip 33 forms a switch by which thepawl 23, during its return movement, is directed away from the guidingsurface 43, and is thereby operative to drive the platen through agreater distance during the return of the driving crank 25 than duringthe forward throw of the crank. Suitable spacing is thus provided on therecord sheet between the last entry of a bill and the first entry of thesucceedin bill.

The operation of the crank 25 has been described as if it were entirelymanual. It is a feature of the present invention, however, that thereturn of the platen when the written bill isremoved, may be largelautomatic. To this end, the crank 25 as attached thereto a bar 53, theother end of which is set between two retaining ears 54 on a cup casing55 which forms the movable member of a spring drum mounted on the platenshaft. T e spring 56 of the r": :rw

55, and at its other end to a hub 58 on a disk 38, held fast to theframe'by the screw 32 which attaches it and the disk 31 .to the tie-rod32. The disk 38 lies against the drum casing 55 to form with the lattera closed casing for the drum spring. Disk 38 is slightly spaced fromdisk 31 'to provide room for the trip cap 42, and for the tie-rodattachment. The spring 56 is wound when the crank 25 is in Fig. 5position, and when released to action, operates through the drum 55 andbar 53,, to throw forward the crank25. Normally the drum is lockedagainst action. The lock consists of a latch 59 in the form of a leverpivoted at 60 to the frame, one arm of the latch lever carrying a'finger piece 61, another arm of the lever carrying a detent or stop 62which, when the latch lever is in normal position,

lies in the path of 2. lug or shoulder 63 on the drum 55, and holds thelatter against the action of the spring 56. After a bill has beenwritten and is to be removed, the finger piece 61 is depressed. Thislifts the detent 62 out of the way of the stop 63 and would cause thecrank 25 and connected parts to be thrown until arrestedby'theadjustable stop 44, except that, on'depression of the release lever, asecond "detent' 62 thereon,

which forms with the detent 62, a sort of under, and by, the detent 62.Thus, upon depression of the finger piece 61, there is a slight movementof-the spring drum, which is in effect a mere setting'of. the drum forits real throw, which takes place when the pressure on the fingerpiece'61 is released.

Besides setting the drum, the finger piece 61, when depressed, operatesto move the pressure rollers 6 and 6 to relieve the pressure of thesanie on the platen, so that the Written bill may he slipped out at thefront of the platen. This movement of the pressure rollers is efiectedfrom the finger piece 61, simultaneously with the setting of the drumspring. by means of a finger 65v on the and the latter lever and itsconnected parts are thereby operated precisely as if operated from thefinger piece 17, as heretofore described. While the pressure on thefinger piece 61 is maintained, the written bill is removed. During thisremoval, the paper fingers hold the record sheet; but, by reason of theshorter length of the bill head, do not engage the latter.

When the pressure is removed from the finger piece 61, a spring 66,which is connected at one end to the lever 59 and at its other endto theplaten frame 3, restores the lever 59 to normal position therebyremoving the detent 62 from. in front of the stop 63% lDetent 62 is alsoat the same time returned to the path of the stop 63, but is now behindthe latter, so that the drum spring is free'to throw the crank lever 25until the latter strikes the adjustable stop 44:. Pressure rollers 6 and6 are returned to their operative position by springs 12 simultaneouslywith movementpf the lever 59 to release the drum, so that the rolls runon the platen while the latter is being rotated by the drum spring. lheparts when finally arrested by the stop 4:4: are .in position for theinsertion of the new bill head.

When the new bill head with its carbon is in position to be engaged atits leading edge by the pressure rolls, the crank 25 is thrown manuallyback to bring them to printing position. In this movement, because ofthe connection 53, the drum member 55 is also returned to normalposition, and the drum spring 56 thereby wound up.

When, on the return movement, the stop 63 reaches the detent 62 on therelease lever, the

latter is cammed up by means of a cam face 67 thereon, and after passagethereby of the stop 63, drops again to its retaining position'in frontof the latter. It will be noted that the detent 62 in looking the drum,also, by reason of the connection of the drum to the crank 25, locks thelatter with its connected parts-during the writing of the bill, anduntil the release lever is again operated. Variations may be resorted towithin the scope of the invention, and portions of the im rovements maybe used without others. aving thus described my invention, I

' 1 7 claim:

'1 In a typewritin machine, the combination with a revolu le platen; ofa pressure device for holding the paper to the platen; means forrelieving the pressure of said device on the platen to permit removal ofa sheet; a driver for the platen; a motor and connections therefrom tosaid driver to throw the platen in one direction; and

means whereby, upon release of the pressure-relieving means, the driverand platen are automatically delivered to the action of said motor toposition the platen for another sheet.

2. In a typewritin machine, the combination with a revolub e platen; ofa pressure device for holding the paper to the platen; means forrelieving the pressure of said de vice on the platen to permit removalof a sheet; a driver for the platen; a motor and connections therefromto said driver tothrow the platen in one direction; means for settingthe motor connections when the pressure-relieving device. is operated;and

- macaw means for automatically delivering the driver and platen to theaction of the motor when the pressure-relieving means is released.

3. In a typewritin machine, the combination with a revolu le platen; ofa pressure device for holding the paper to the platen; means forrelieving the pressure of said device on the platen to permit removal ofa sheet; a driver for the platen; a motor and connections therefrom tosaid driver to throw the platen in one direction; means whereby, uponrelease of the pressure-relieving means, the driver and platen areautomatically delivered to the action of said motor to position theplaten for another sheet; and means whereby manual operation of thedriver in the opposite direction, to bring the newly inserted sheet toprinting position, causes power to. be stored in the motor forsucceeding power drives of the platen.

4. In a typewriting machine, the combination with a revoluble platen, ofa pressure device for holding the paper to the platen; means forrelieving the pressure of said device on the platen, to permit removalof a sheet; a driver for the platen; a spring drum; a connection fromthe drum to the driver; a stop on the drum; a detent connected to saidpressure-relieving device and .normally in the path of said drum stop tohold the drum inoperative, said detent being removed from the path ofsaid drum stop when said pressure-relieving device is operated; and asecond detent on said pressure-relieving means which engages the drumafter said drum stop has passed the first detent and which holds thedrum until removed therefrom by the release of the pressure relievingmeans, whereupon the drumis released to drive the platen to posi tionfor the insertion of another sheet.

'5. In a typewriting machine, the combination with a revoluble platen,of a pressure device for holding the paper to the platen; means forrelievmg the pressure of said device on the platen, to permit removal ofa sheet; a driver for the platen; a spring drum; a connection from thedrum to the driver; a stop on the drum; and a detent connected to saidpressure-relieving device and normally in the path of said drum .stop tohold the drum inoperative, said detent being removed from the path ofsaid drum stop when said pressure-relieving device is operated.

6.'In a typewriting machine, the combnation with a revoluble platen, ofa pressure device for holding the paper to the platen; means forrelieving the pressure of said device on the platen, to permit removalof a sheet; a driver for the platen; a spring drum; a connection fromthe-drum to the driver; and an escapement mechanism contan em nected tothe pressure-relieving means whereby movement of the latter in one d1-rection sets the drum for a drive of the platen, and operation of thepressure-reliev- 7. In a typewriting machine; a revoluble platen;pressure rollers and paper clutching fingers coiiperating with theplaten to hold paper to the latter, the pressure rollers being withinthe margins defined by the paper fingers so that'the former may engage abill head or the like which is free from the latter, while thelatterengages a record sheet lying beneath the bill head; means for relievingthe pressure of the pressure rollers on the bill head to permit removalof a written b111 and means controlled by the pressure-relieving meansand acting auto matically upon releaseoi the latter after removal of abill, to throw the platen, with the record sheet, in counter-line-feeddirection to a position where another bill head may be fed into themachine without allowance of space on the record sheet for display andsimilar matter on the bill head.

8. In a typewriting machine; a revoluble platen; pressure rollers andpaper clutching fingers 'coiiperating with the platen to hold papertothe latter, the pressure'rollers being within the margins defined by thepaper fingers so that the former may engage a bill head or the likewhich is free from the latter, while the latter engages a record sheetlying beneath the bill head; means for relieving I the pressure of thepressure rollers on the lli hll

' printing on the latter,

bill head to permit removal of a written bill; means controlled by thepressure-relieving means and acting automatically upon re lease of thelatter after removal of a bill, to throw the platen, with the recordsheet, in

counter-line feed direction to a position where another bill head may befed into the machine without allowance of space on the record sheet fordisplay and similar matter on the bill head; and means for thereafterdriving the platen with record sheet. and new bill head "to a positionfor properly 9. lln a typewriting machine arevoluble platen; pressurerollers and paper clutching fingers coiipcrating with the platen to'holdpaper to the latter, the pressure rollers being within the marginsdefined by the paper fingers so that the former may engage a bill heador the like which is fi'ee from the till latter while the latter engagesa record sheet lying beneath the bill head; means for relieving thepressure of the pressure rollers on the bill head to permit removal of aI written bill; means controlled by the pres- (lid.

sure-relieving means and acting automatically upon release oi the latterafter removal of a bill, to throw the platen, with ing fingerscoiiperating with the platen to hold paper to the latter, the pressurerollers being within the margins defined by v the paper fingers so thatthe former may engage a bill head or the like which is free from thelatter while the latter engages a record sheet lying beneath the'billhead; means for relieving the pressure of the pressure rollers on thebill head to permit removal of a written bill; means controlled by thepres sure-relieving means and acting automatically upon release ofthelatter after removal of a bill, to throw the platen, with the recordsheet in counter-line-feed direction to a position where another billhead may be fed" into the machine without allowance of space on therecord sheet for display and similar mat.- ter on the bill head; meansfor thereafter driving the platen with record sheet and new bill head toa position for properl printin on the. latter, said backward an forwardriving means being normally disconnected from the platen" and means forautomatically disconnecting both of said driving means from the platenwhen the new bill head has arrived at printing position.

11. In a typewriting machine, the combination with a rotary platen, of amotor to rotate the platen,means for normally holding the motor at restunder tension and disconnected from the platen'to permit the lat- 1 terto be rotated independently ofthe motor,

a motor-control key operable to release the motor, and means operated bysaid motor to controlling key, and means operated by the key whendepressed to release the pressure rolls from the platen, said keyoperable when loo lltl

released to efi'ect a return of the pressure rollsto' the platen, saidhey also operable when released to efiect a driving, connection betweenthe motor and the platen whereby" the platen is driven by the motor. a

' 13. In a typewriting machine the combination with a rotary platernofpressure rolls to bear against the platen and hold a workiii piecethereon, a motor, means to normally hold the motor at rest and undertension, a controlling key, means operated by the key when depressed torelease the pressure rolls from the platen, said key operable whenreleased to, effect a return of the pressure rolls to the platen, saidkey also operable when released to efi'ect a driving connection betweenthe motor and the platen whereby the platen is driven by the motor, astop to limit the platen-driving movement of the motor, a crankconnected to the motor for returning the latter, and a stop to limit thereturn movement of the motor, the motorholding means being automaticallyreset to hold the motor as the latter is returned to its normal positionof rest.

14. The combination with a rotary platen,

additional means for holding on the platen a work-sheet overlying therecord sheet, a motor normally held under tension and disconnected fromthe platen to permit the platen to rotate independently thereof, and acontrolling key manually operable in one direction to release saidadditional holding means from the work-sheet to permit it to bewithdrawn from the machine, while the said record sheet is held on theplaten, said controlling key operable in the reverse direction torelease the motor and efi'ect a driving connection between the motor andplaten for rotating the latter.

15. The combination with a rotaryplaten,

of means for holding a'record sheet thereon, additional means forholding on the platen a work-sheet overlying the record sheet, a motornormally held under tension and disconnected from the platen to permitthe platen to rotate independently thereof, a controlling key manuallyoperable in one direction to release said additional holding means fromthework-sheet to permit it to be withdrawn fromv the machine, while thesaid record sheet is held on the platen, said controlling key operable,when released, to restore said work-sheet-holding means andconcomitantly efi'ect a driving connection of the motor to the platenand cause the platen to be rotated by the motor and a stop to determinethe extent of rotation of the platen by the motor.

16. In a typewriting machine, the combination with 'a rotary platen, offeed rolls to bear against a work-sheet on the platen, work-holdingmeans arranged to engage the margins of an underlying record sheetextending laterally beyond said work-sheet, a motor to rotate theplaten, a trip device to normally hold the motor at rest under tensionand disconnected from the platen, and a key operable, when depressed, torelease said feed rolls from the platen and permit said work-sheet to bewithdrawn while the underlying record sheet is held by its hold incenseing means, said key cperable,'when released, to edect a return of thefeed rolls to holding position, sald key also controlling said tripdevice and operable concomitantly with the return of the feed rolls, torelease the motor and efiect a driving connection between the, motor andthe platen, whereby the platen is rotated by the motor. 4 f

17. In a typewriting machine, the combination with a revoluble platen,of a spring motor, means to normally hold the motor at rest under anoperating tension and disconnected from the platen to permit the platento rotate independently thereof, means to release the motor at will fromsaid holding means, means to enable the motor to connect itself to theplaten and drive the latter in counter-line-feed direction from theposition it occupies at the time of connecting the motor thereto,adjustable means for arresting the platen after a variable predeterminedthrow of the latter by the motor, a crank for revolving the platen inthe reverse direction, and retensioning the motor, and. means forarresting the crank after such reverse movement of the platen in excessof its forward throw by the motor, and for disconnecting the motor fromthe platen and restoring it to the control of said holding means.

18. In a typewriting machine, a rev luble platen, a crank loose on theaxle thereof, a normally inactive motor connected to the crank andnormally under a driving tension,

normally inactive motor connected to the crank and normally under adriving tension, restramm means for said motor, means for releasing t emotor and crank, means to enable the crank to connect itself to theplaten to drive the same under the tension of said motor, saidconnecting means including. a toothed wheel fast to the platen, a dog onthe crank for engagement with the toothed wheel, and trippmg mechanismfor causing the dog to engage and disengage the toothed wheel, and meansfor automatically restoring the crank and motor to the control of saidrestraining means when they are disengaged from the platen. 1

20. In a typewriting machine, a revolnble platen, a crank loose on theaxle thereof, a

normally inactive spring motor connected to the crank, releasable meansfor restraining the crank and motor, a tOOthBGL wheel -me'chalnism forcausing the do income fast to the platen, a dog on the crank forengagement with the toothed wheel, tripping to engage and disengage thetoothed whee and means for automatically operating the trip to dis:engage the crank and platen after a return movement of the latter inexcess of its forward movement, and for restoring itto the control ofsaid releasable means.

21. The combination with a revoluble platen and feeding devices toengage the side edges of the record sheet, of a'main feed roll, arelease key therefor, a normally disconnected platen-returning spring,means nor mally restraining said spring, means controlled by said keytorelease said restraining means upon the release of said key, andautomatic means to connect said spring to the platen to drive the same.

22. The combination with a revoluble platen and feeding devices toengage the side edges of the record sheet, of a main feed roll, arelease key therefor, a normally disconnected platen-returning spring,means normally restraining said spring, means controlled by said key torelease said restraining means upon the release of said key, automaticmeans to connect said spring to the platen to drive the same, and amannally-operable device to return said platen and re-tension saidspring.

23. The combination with a revoluble platen and feeding devices toengage the side edges of the record sheet, of a mainfeed roll, a releasekey therefor, a normally disconnected platen-returning spring, meansnormally restraining said spring, means controlled by said key torelease said restraining means upon the release of said key, automaticmeans to connect said spring to the platen to drive the same, amanually-operable' device to return said platen and retension saidspring, and means to enable said spring to become automaticallydisconnected from the platen and restored to the control of saidrestraining means] FRANK L. MORGAN.

Witnesses:

L. ERWIN JACOBS, Jams MURRAY-

